fundamentals of door prehanging production

Transcription

FUNDAMENTALS OF DOOR
PREHANGING PRODUCTION
October 2007
INTRODUCTION
This document is designed to provide information regarding pre-hung door production.
Components, terminology, and processes used in the pre-hung door industry are explained. Our hope is that this
information can be used to standardize the language of a door shop, and may be particularly valuable to new employees.
The concepts and information presented in this document is provided to enable you to benefit from Norfield’s
many years of experience in the pre-hung door industry.
We encourage sharing, and of course any feedback for improvement.
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TABLE OF CONTENTS
Page

SECTION ONE
Glossary of Terms...........................................................................................................................5-10

SECTION TWO
Materials, Components, Processes and Nomenclature
Components of a Typical Pre-Hung Door...............................................................................12
Door Hand................................................................................................................................................13-14
Lock Height...............................................................................................................................................15
Backset.........................................................................................................................................................16
Lock Bore...................................................................................................................................................17-18
Latch Bore..................................................................................................................................................17-18
Faceplate Mortise..................................................................................................................................17-18
Deadbolt Spacing...................................................................................................................................17-18
Hinge Pattern...........................................................................................................................................19-20
Hinge Sizes................................................................................................................................................21
Jamb Machining.......................................................................................................................................21-23
Header Clearance.................................................................................................................................24
Hinge Mortise Dimensions..............................................................................................................25
Hinge Backset (Reveal).......................................................................................................................26
Door Jambs...............................................................................................................................................27-28
Jamb Assemblies.....................................................................................................................................29-31
Door Types and Sizes..........................................................................................................................32-33
Casing...........................................................................................................................................................34-38

SECTION THREE
Shop Organization
Shop Layout Theory.............................................................................................................................40-41
Component Flow...................................................................................................................................42-43
Material Handling...................................................................................................................................44-46
Operation Descriptions.....................................................................................................................47-48
Measuring Shop Efficiency.................................................................................................................49-50
Pneumatic Layout...................................................................................................................................51-55
Electrical Layout......................................................................................................................................56

SECTION FOUR
Sample Shop Layout............................................................................................................................57

SECTION FIVE
Norfield Machinery...............................................................................................................................76-77
w w w. n o r fi e l d . c o m
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Section one • GLOSSARY OF PREHANGING TERMS
Glossary of
Prehanging Terms
Section one
Active: In paired or double doors, the hinged door leaf which is primarily operable.
Affidavit Label: A label that is placed on a fire-rated door in that a manufacturer states that the door meets
certain test criteria.
Air Infiltration: Air passing through a door unit when the door is under pressure, usually from wind.
Annealed Glass: Glass, which has been heat strengthened or tempered.
Astragal: A wood or aluminum ‘post’ attached on the latch-side edge of one of a set of paired or double doors,
which covers the space between doors when they are closed. Which acts like a stop for the active door.
Backset: Recess, or spacing, for locating a machined hole. The distance from an edge or surface to the center or
edge of the recess, hole or mortise.
Ball-bearing Hinge: A heavier-duty hinge than the standard hinge, with bearings
supporting the pivots. Ball-bearing hinges are usually used for heavy doors that will be in commercial or industrial
use.
Ball Catch: A spring loaded ball mechanism that is inserted into the top edge of doors that have dummy locks.
The ball engages a plate on the header that has a dimple to receive the ball, which in turn keeps the door closed.
Boot: A term used for the rubber part at the bottom or top end of an astragal, which beds the astragal end and
seals between the end and the door frame or sill.
Boss, Screw Boss: A part that enables the fastening of a screw into the feature, thereby allowing assembly of
the part with another. Screw bosses are common features of molded plastic lite frames and extruded aluminum
doorsills.
Box-Framed: In door and sidelite assemblies, a term used to differentiate door and sidelite units which are first
framed as separate units, with heads and sills separate and the width of the door or sidelite panels. Box-framed
doors are joined to box-framed sidelites.
Brad: A small nail with a small head, usually used to fasten small trim and moldings, also known as a finish nail.
Brickmold: A molding, usually 1-1/4” x 2”, used to trim the outside
edge of a exterior door frame.
Buck: A term usually used in masonry construction to describe a door frame or a sub-frame in a masonry opening, around which a steel door frame wraps and is fastened.
Butt: A type of hinge commonly used to assemble doors. Butt hinges are often
referred to simply as butts.
Carpet Shim: A spacer block used under a doorsill to raise the sill an appropriate amount, if carpet is used, so
the door clears the carpet when opened.
Casing: A horizontal or vertical molding, which accents or trims edges of doors and windows to the surrounding
walls.
Caulking: Sealant, which is usually extruded or trawled into a recess or joint, to seal against air and water leakage
through the joint.
Clad: Provided with a facing or jacket which works as a protection against weather, and provides a finished appearance. Cladding may be painted metal, plastic, or a heavy coating applied by the manufacturer.
Clear Jambs: Natural wood door frames, without paint or primer applied, and which appears to be made of fulllength pieces of stock, without joints or knots.
Closed-Cell Foam: Sponge-like material, usually used in gaskets and weather-stripping, which compresses into
joints, but absorbs little water.
Closer Block: An inside reinforcement, usually placed across the top edge of a door, to enable firm fastening of
self-closing hardware to the door.
Continuous Sill: A sill used for a type of door and sidelite unit in which the unit has full-width top and bottom
frame parts, and an internal post or posts separating sidelites from the door panel.
Core: The center section of a door.
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Corner Plug, Corner Seal Pad: A small part, usually made of resilient material. It is used to seal water, which
gets beyond the bottom ends of weather-stripping in doors, from getting between the door edge and the jambs,
adjacent to the bottom gasket.
Cove Molding: A small molded wood lineal piece, usually formed with a scooped face, used to trim and fasten a
panel of some type into a frame.
Cross-bore: A large through-hole, near the edge of a door panel, usually 2-1/8” inch in diameter, which houses a
cylinder lockset or deadbolt latch.
Cylinder Lock, Cylindrical Lock: Lock hardware that mounts into a door which has been prepared with a
bored hole or holes through the face, and into the edge.
Dado: A machined or sawn groove, across the width of a part. Rectangular groove cut into a board or part so
that a matching piece can be fitted into it to form a joint.
Deadbolt: A latch used to secure a door closed, the latch being driven from the door into a receiver in the jamb
or frame.
Deadbolt Spacing: The distance between the cylinder lock to the bore for the deadbolt lock.
Door Hand: The door hand is the description of which side of the door the lockset is on and consequently,
which side of the door has the hinge pins visible.
Doorlite: An assembly of frame and glass panel, which when fitted to a door in a
formed or cut-out hole, creates a door with a glass opening.
Double-Glazed: Outfitted with two panes of glass with a sealed airspace between.
Drip Strip: In exterior doors, a fitting used across the outside face of the door adjacent to the bottom edge. It is
used to divert cascading rain away from the door bottom edge and away from the door/sill joint.
Drywall Opening: A rectangular opening in a wall, usually an interior wall, prepared to the size necessary to
receive a pre-hung door assembly.
Dummy Cylinder: A lock without a latch, typically used for the passive door panel of a double door unit, so that
the hardware appears equal to that used on the active panel.
Edge Bore: The hole bored through the edge of a door to allow the latch hardware to pass through, into the
jamb strike prep.
Electric Strike: A mechanism, which allows a switch to open the latch of a door.
End Seal Pad: A closed-cell foam piece, about 1/16-inch thick, in the shape of a sill profile, fastened between the
sill and the jamb to seal the joint.
Escutcheon: A stamped decorative plate, usually circular. It is used to trim the shaft of a door knob or deadbolt
latch or to trim the opening where the shaft or latch adjoins the face of a door.
Etched Glass: Glass used for doorlites on which a decorative pattern is engraved by means of chemical action
or mechanical sandblasting.
Faceplate: The plated or solid metal trim piece, usually about 1 x 2-1/4 inches, that is housed flush into the edge
of a door, which projects the latch of a passage lock or deadbolt.
Faceplate Mortise: The pocket in the edge of the door that is mortised to receive the Faceplate.
Finger Joint: A way of joining short sections of board stock together, end to end to make longer stock. Door
and frame parts are often made using finger-jointed pine stock.
Fire Door: A door of a construction type, which has been tested to contain the spread of fire from one room
or occupancy area to another. Fire doors are listed and labeled to show their ratings in terms of time, i.e., 1/2 hour,
1-1/2 hour, etc.
Flush-Glazed: A type of glazed door which has its glass perimeter moldings flush with or set down from the face
of the surrounding door.
Foam: Rigid or flexible plastic, light in weight and cellular in structure, used in door construction. Rigid foam is
used as the insulating and binding core for doors. Flexible foam is sometimes used as a gasket around door openings.
Foot Bolt: A steel pin housed in a door bottom edge or astragal, with a latch mechanism, which can be driven
down into a receiver socket or hole in the floor or threshold. It allows the door to be better secured when closed.
Frame: In door assemblies, the perimeter members at the top and sides, to which the door is hinged and latched.
See jamb.
Glazing: The elastic material used to seal glass to a surrounding frame.
Grille: For doors with glass lites or inserts, a removable face-mounted assembly of thin wood or plastic pieces,
which when in place, gives the lite or insert a patterned multi-pane look.
Grooved Glass: Glass, which has been decorated with abrasively routed recesses. Grooving can give a single
piece of glass a multi-paned look.
Handing: A term, which describes or determines the direction of swing of a door when opening.
Head Bolt: A steel pin housed in a door top edge or astragal. See foot bolt.
Head, Head Jamb: The horizontal top frame member of a door assembly.
Header Clearance: The clearance between the top edge of the door and the head jamb.
Hinge: An assembly of metal plates and a cylindrical metal pin, which when fastened to a door edge and to a
doorframe, allow the door to swing or rotate in its frame.
Hinge Pattern: The dimensions that locate the hinges on the door edge.
Hinge Sizes: The distance across the hinge, measured parallel to the hinge pin.
Hinge Stile: The full-length vertical pane of a door, at the side or edge of the door, which fastens to its frame
with hinges.
Inactive: A term for a door panel fixed in its frame. Inactive door panels are not hinged and are not operable.
Insulated Glass, Insulating Glass: A glass assembly of multiple full-lite pieces,
separated by a perimeter spacer and sealed as a unit. Insulated glass in residential doors is usually made with two
thicknesses of 1/8-inch glass, separated by an airspace up to 3/4-inch thick.
Inswing: A term used to describe an exterior entry door unit for which, when the
hinged door panel is opened, the panel swings into the building.
Jamb: A vertical perimeter frame part of a door unit.
Jamb Jack: A fastener device for fixing a door frame to a wall structure, which allows the space or margin between the frame and the structure opening, to be varied by turning the fastener screw.
Jamb Stop: In interior door frames the stop is the material attached to the jamb to which the door closes
against. In exterior doorframes, the molded-in rebate surface of the jamb against which door panels close and seal.
Kerf: A thin slot cut into the mitered end of casing to attach and align the pieces using a kerfing nail, a specialty
fastener. A thin slot cut into an exterior jamb, that weather-stripping can be inserted.
King Stud: In a wood-framed rough opening, the stud which runs full height from floor plate to ceiling plate,
against which trimmer stud attaches.
Knuckle: The feature of a hinge where the hinge leaf is cut for two or three projections which wrap and form a
barrel or socket for the hinge pin.
Laminate: A thin sheet of wood or plastic that is bonded with adhesive to a core or substrate, which creates a
decorative and usable surface.
Latch: A moveable, usually spring-loaded pin or bolt, which is part of a lock mechanism, and engages a socket or
clip on a door jamb, retaining the door closed.
Latch Bore: The hole drilled into the edge of a door to accept the door latch portion of the lock hardware.
Leaf: A term which can apply to a door or hinge and which defines a part of the
assembly which can swing on a pivot. Butt hinges have two leaves.
Lite: An assembly of glass and a surrounding frame, which is assembled to a door, or is integrally built into the
door at the factory.
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Lock Block: A rectangular block of wood or other solid material, placed inside a door assembly at the lock side
edge, which reinforces the assembly when the lock hardware is installed.
Lock Bore: For cylindrical locksets, the large through hole, usually 2-1/8-inches in diameter, bored near the door
panel’s lock edge, into which the lock mechanism is placed and installed.
Lock Height: The dimension from the top of the door to the center line of the lock bore.
Lock Stile: In insulated door assemblies, the full-length part, usually wood, which makes up the lock edge of the
door panel. In wood stile and rail doors, the full length wood piece, 4 to 6-inches wide, at the lock edge of the
door.
Low-E Glass: Glass which has been factory coated with a thin layer of material,
nearly clear, which acts to absorb and reflect heat and UV rays.
Miter: An angled cut across the end of a lineal part, usually done to join with a
similarly cut part at a corner. Most typically used in casing.
Mortise: A recess cut into the surface or edge of a part, usually for the purpose of housing hardware such as
hinges, latch plates etc.
Mortise-Type Lock: A lockset which usually has a rectangular-shaped mechanism, which is housed into a deep
recess cut into the edge of a door.
Mull: A short term for mullion. Used occasionally as a verb to describe the joining of two door units together, or
the joining of a door to a sidelite unit.
Mulled: An adjective describing a door and sidelite unit which has been made up by edge-joining two framed
units together.
Mullion: A post or divider which runs from sill to frame top in a multi-panel door, or door and sidelite assembly.
In stile and rail doors, the vertical wood parts which separate panels.
Multiple Extension Unit: In patio door assemblies, a fixed door panel in a separate frame, edge-joined to a
patio door unit to add another glass panel to the installation.
Muntins: In glazed lite assemblies, thin vertical and horizontal divider bars, which give the lite a multi-paned look.
Muntins may be part of lite frames, and on the outside surface of the glass, or assembled between glass in insulated
glass units.
NRP Hinge: An abbreviation for a hinge with a non-removable pivot pin. NRP hinges are used when exterior
doors swing out, as a security feature. The fixed pins make it impossible to remove a door by driving out pivot pins.
Open-Cell Foam: A foam material which has passageways between cells. Open-cell foam will absorb and retain
water, because the water will penetrate deeply inside the foam.
Outswing: An exterior door assembly in which the door panel swings outside the
building.
Panic-proof Lock: A lock and latch device, which permits a door to be, opened outward by pressure being applied to a horizontal bar mounted across the inside face of the door.
Passage Lock: A lock-set, which will retain a door, closed, but which cannot be locked.
Passive: In a double or two-panel door assembly, the door, which usually remains, closed and fixed by bolts at top
and bottom. The other door panel is used for regular passage.
Plant: A decorative molding applied to the surface of a flush door, to give the
appearance of a raised-molding design.
PVC: Abbreviation for polyvinyl chloride, a plastic material used to make molded or extruded parts.
R-Value: A number which describes in relative terms the ability of a material or
assembly to resist the flow or transmittance of heat. Assemblies or materials with high R-values are better insulators than those with lower R-values.
Rabbet, Rebate: A groove or step cut along the length of the edge of a piece of wood that is to be joined to
another with a corresponding tongue or ledge cut into it.
Rail: In stile and rail doors, horizontal pieces at the top and bottom edges, and at intermediate points, connecting
the stiles together.
Rebate: See rabbet.
Reveal: The offset or space between edges of parts.
Riser: A term which describes the part of an adjustable sill which can be moved up or down by turning adjusting
screws.
Rough Opening: A structurally-framed opening in a wall which receives a door unit or window.
Safety Glass: Glass which when broken, shatters into small pieces without sharp edges.
Sealant: Elastic material pumped or trawled into a joint to prevent water penetration.
Shim: A thin piece of material used between parts of an assembly, to change and fix the distance between parts,
when they are fastened.
Sidelite: A fixed narrow panel, installed next to a door panel, for decorative purposes. Sidelites almost always
contain glass.
Slide Bolt: The part of an astragal assembly which, by means of moving latches at the tops and bottoms of astragals, places bolts into frame heads and sills. It is for fixing passive doors closed.
Stile: In stile and rail doors, the vertical pieces on both sides that connect the rails together, enabling lock, latch
and hinge mortising to be done.
Strike: A metal part with a hole or recess for receiving a door latch. It has a curved or ramped face so that a
spring-loaded latch contacts it when closing. Strikes are fit into mortises in doorjambs or mullions, and screw-fastened.
Stile and Rail Doors: A type of door constructed without a door skin, so that the vertical and horizontal members are visible and panels are held in place between both stile and rail.
Substrate: The base or core material in an assembly of parts. The full-length wood or composite part of the sill.
Tempered Glass: A glass sheet, which has been strengthened by heat processing.
Template: A pattern or jig used to machine-cut a precise hole or recess into a door or frame part.
Thermal Break: A feature of a door or frame assembly which separates metal or glass exposed to outside temperatures from coming into contact and transmitting heat to or from inside-exposed parts.
Threshold: Another term for sill. The horizontal part of a door assembly, fixed under the door panel and bearing
on the floor.
Transom: A framed glass assembly mounted atop a door assembly. Transoms are rectangular curved or arched
tops. One design of a curved top transom has the shape of a half-ellipse.
Trimmer Stud: In a wood-framed rough opening, the stud or framing member which runs vertically from the
sub-floor to and supporting the structural header member, into which a door frame is fastened.
Triple-Glazed: An insulated glass assembly made of three thicknesses of glass, with air spaces between the outer
and inner thicknesses.
Veneer: A thin film or facing, adhesively bonded to a core or substrate, which makes up the exposed and decorative face of an assembly.
Warp: A permanent curvature or deviation from straightness, which can be induced in a part or assembly by a
load or force, or by exposure to heat or moisture.
Wired Glass: Glass made for use in fire doors, which has embedded wires which bind the glass, and permit the
glass to remain solid when exposed to fire.
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Section two • Components of a pre-hung door unit
Components of a
Pre-hung Door Unit
Section two
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COMPONENTS OF A TYPICAL PRE-HUNG DOOR
The drawing on the following page illustrates the components of a typical pre-hung door. All pre-hung door units,
whether interior or exterior, consist of at least these basic components:
•Door
•Head jamb (header)
•Hinge jamb
•Strike jamb
•Hinge butts
The door is attached to the hinge jamb with hinges. Lock and latch hardware is not generally considered part of
the pre-hung door as it is installed after the unit has been installed in the opening. In addition to these
components, some units will include casing on one or both sides and exterior units can have a sill installed.
In general terms, if a door unit is assembled when it is shipped from the manufacturer to its destination, it is
referred to as a “pre-hung door.” If the components are machined but not assembled when shipped, it is known as
a K.D. (“knock-down”) unit.
Head Jamb
Door
Hinge Jamb
Strike Jamb
Hinge butt
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DOOR HAND
All doors are denoted by the direction of their swing, or their “hand.” Before a door can be hung, its swing must
be known.
Currently, there are two methods used to determine the hand of a door. The first method, the one most straightforward and commonly used, designates the door simply as Right Hand (RH) or Left Hand (LH). To determine the
swing of the door, simply face the hinge pin side of the door and note the location of the door knob. If the knob is
to the left, it is a Left Hand door. If the knob is to the right, it is a Right Hand door.
The other method currently in use designates the door as either Right Hand Reverse (RHR) or Left Hand Reverse
(LHR). To determine the swing of the door in this method, face the outside of the door. The outside is the street
side of an entrance door, the corridor (hall) side of a room door, or the side opposite the hinge pins on a
communicating door (a door that connects two rooms). If the door opens toward you and the hinges are on the
left, it is a Left Hand Reverse. If the hinges are on the right, it is a Right Hand Reverse.
Although both methods are equally accurate and achieve the required results, the first system is preferred. Before
hanging a door, make sure that all concerned agree on the method that will be used. This will prevent confusion
down the line when the pre-hung doors are actually being installed.
Standard Door Swings
Left Hand Door
Right Hand Door
Hinge Pin
Hinge Pin
Lock Bore
Lock Bore
Outside
Inside
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Standard Door Swings for “Out Swing” Doors
By Switching inside to outside orientation of door, swinging out rather than in, the hand is called reversed.
Left Hand
Reverse Door
Right Hand
Reverse Door
Hinge Pin
Hinge Pin
Lock Bore
Lock Bore
Inside
Outside
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LOCK HEIGHT
Lock height is the distance from the top of the door to the center of the lock bore. Normal lock heights are 44”
and 40” on 6’8” doors and 48” on 7’0” doors, 60” on 8’0” doors.
Because of variation in door length (i.e., doors are not necessarily the precise length their labeling would indicate),
lock height is always measured from the top of the door. This insures that proper header clearance is maintained
and that the lock hardware aligns with the machining and hardware in the strike jamb.
Typical Lock Heights
8’-0”
6’-8”
7’-0”
44”
60”
48”
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BACKSET
Backset is the distance a lock is centered from the front edge of the door.
For residential applications the backset is 2-3/8” (most common) or 2-3/4”. For the commercial market backsets
are usually, 2-3/4” or 5”. Correct backset is necessary to insure that lock hardware fits the machined door properly.
One method of defining backset is measuring from the centerline of the door’s edge to the center of the lock
bore.
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LOCK BORE
The lock bore (or cross bore) is a hole drilled through the face of the door at a specific “backset.” The lock bore
must be of sufficient diameter to accommodate the lock hardware. Lock bore diameters range in size from 1-3/8”
to 2-1/8,” with 2-1/8” being the most common. The dead bolt bore is the same as the lock bore and must be the
right diameter and backset to accommodate dead bolt hardware.
Some lock hardware does not require a through-lock bore (i.e. “pulls” for pocket doors or certain dead bolt locks).
In this case, care must be taken to drill the proper face of the door relative to the beveled edge.
LATCH BORE
The latch bore (or edge bore) is a hole drilled into the edge of the door for the latch bolt. It is drilled on the
centerline of the lock bore and is centered in the edge of the door. Latch bore sizes run from 7/8” diameter to 1”
diameter, with 1” being the most common.
The latch bore and dead bolt edge bore are always drilled into the lock bore. However, some dead bolts require
that the edge bore be drilled deeper than the back edge of the lock bore.
FACEPLATE MORTISE
The faceplate mortise is a relief on the edge of the door for the latch faceplate. Its width and length will vary with
the specific lock hardware being used. The most common width and length is 1” x 2-1/4”. The mortise depth
matches the thickness of the faceplate. If a “drive-in” bolt is used, the faceplate mortise is omitted and a cleaner
cut is usually wanted.
DEADBOLT SPACING
Deadbolt spacing is the dimension from the center of the lock bore “up” to the center of the deadbolt cross bore.
This dimension varies with the hardware used and the specifications for various door units.
17
Lock and Deadbolt Machining
Deadbolt Bore
Latch Bore
Faceplate Mortise
Deadbolt Spacing
Faceplate Mortise
Latch Bore
Lock Bore
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HINGE PATTERN
Hinge pattern, or butt spacing, is usually described as a dimension in inches from the top of the door to the top of
the top hinge and from the bottom of the door to the bottom of the bottom hinge. Examples of this are “7-11”,
“8-8”, and “9-9”.
The more common and accurate method is to measure from the top of the door to the centerline of the top
hinge then from this centerline to the center of the middle hinge (if applicable) then to the centerline of the bottom hinge.
If the centerline is used, it is always centered exactly between the top and bottom hinges. If the door has four
hinges, the two center hinges are equally spaced between the top and bottom hinges.
The location of the top and bottom hinge remains constant in relation to the door stile, regardless of the door
height. For example, if a 6’8” door with a 7-11 hinge pattern has been cut down to 6’7” for floor covering clearance, the dimension from the bottom of the door to the bottom hinge would be 10”.
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Hinge Pattern
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HINGE SIZES
Common hinge sizes are either 3-1/2” x 3-1/2” or 4” x 4”. 3-1/2” hinges are used primarily on interior hollow
core doors or on fire-resistant doors that connect two rooms. 4” hinges are used primarily on exterior entrance
doors.
3” x 3”, 4-1/2” x 4-1/2” and 5” x 5” hinges are available but are not commonly used. 3” hinges are found on inexpensive interior door units. 4-1/2” and 5” hinges are found on more elaborate exterior entrance systems or on
special commercial applications.
JAMB MACHINING
Both the hinge jamb and strike jamb are machined to accept door hardware. The hinge jamb is mortised the
same as the door to receive the hinges. The mortises are measured from the top of the jamb (dado) with an allowance for header clearance. Refer to the paragraphs on “header clearance” (page 24) and “hinge backset” (page
26) in the next section for details.
The strike jamb is machined to accept the strike plate. This is a specially shaped piece of metal that is attached
to the strike jamb to accept the latch bolt when the door is closed. There are three basic types of strike plates:
“full-lip”, “T-strike” and “no-lip”. The type used for any particular application depends solely on the type of lock
hardware used. There are many types and shapes of plates within the three groups but the most common of each
type is shown in the illustration.
The location for the strike plate mortise is dependent on the lock height. The distance from the dado on the top
of the jamb, to the center of the strike plate mortise is equal to the lock height plus the header clearance. The
distance from the edge of the jamb to the center of the deep pocket is ½” the thickness of the door being used.
21
Strike Plate Types
Full lip strike plate
No lip or
deadbolt plate
T-strike plate
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Template Number 9202-001
The most common size of full lip strike plate
The most common size of deadbolt strike plate
The most common size of t-strike plate
23
HEADER CLEARANCE
Header clearance (head jamb clearance) is the gap between the top of the door and the head jamb when the
door is closed. It is usually between 1/16” and 3/16”, with 1/8” being the most common.
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Hinge Mortise Dimensions
When setting the dimensions of a mortise on a door machine the hinge reveal or hinge dimension is used. As an
example a Magnum can be set to control the reveal, and the automated machines are adjusted using the hinge
mortise dimensions,
The mortise is set equal distance into the door and jamb and is typically 1-1/8” on a 3-1/2” hinge used on a 1-3/8
thick interior door.
25
HINGE BACKSET (REVEAL)
Hinge backset is the distance from the stop on the jamb to the edge of the hinge mortise and from the face of
the door to the edge of the mortise. The hinge backset must be correct to insure a clearance (reveal) between
the face of the door and the doorstop on the jamb when the door is closed. If weather-stripping is used on the
jamb, the hinge backset may have to be adjusted to compensate for the thickness of the weather-stripping.
Accepted hinge backsets are:
1-3/8” Doors1-3/4” Doors
1/4” - Door
5/16” - Jamb
26
3/8” - Door
7/16” - Jamb
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DOOR JAMBS
The term “jamb” refers to the wood members of the frame of a pre-hung door. They can be made from any
wood species, particleboard, MDF, plastic or other materials. However a few types of wood are most commonly
used. Pine is the most common wood for interior doorjambs and Fir is most often used for exterior jambs. (Philippine Mahogany and Oak are used also, but on a limited basis.) When Pine and Fir are used, it is becoming more
and more common to see the jambs made up of short pieces of wood “finger-jointed” together to make up the
longer lengths.
Doorjambs are divided into two major categories: interior and exterior. Standard interior jambs consist of two
parts--a “flat jamb” and a stop. The stop is stapled to the jamb, usually through the stop into the jamb, but
sometimes through the back of the jamb into the stop. The stop can be applied either before the jamb is machined (most common) or after the pre-hung door assembly is complete.
Another type of jamb used exclusively on interior units is the “split jamb.” This is normally made of two pieces
of wood that fit together to form a single unit. The advantage of this type is that it can be adjusted to match exactly the thickness of the wall when the pre-hung door is installed. Split jambs can also be made from three pieces:
two similar pieces that fit together to make a “flat jamb” and another piece attached to one of them to form the
“stop”.
Exterior jambs are either “single-rabbeted” or “double-rabbeted.” They differ from interior jambs in that
they are made from thicker material, and the stop and jamb are machined from the same piece of wood. Single
rabbeted jambs are the most common. Double rabbeted jambs are used in entry door systems where a screen
door or insulated weather door is used.
27
Cross Section of Different Jamb types
Flat Jamb with
stop applied
Single Rabbeted
Jamb
Double Rabbeted
Jamb
Split Jamb
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JAMB ASSEMBLIES
The previous section discussed the different types of jambs. This section will discuss the ways that jambs are put
together to form the doorframe.
Side jambs are machined at one end to accept the head jamb. This is commonly referred to as the “dado.” The
dado can be cut on the end of the jamb (as shown on the standard jamb, page 30) or a little in from the end (as
shown on the lugged jamb page 31). The standard jamb is most common and is preferred when the door units
are assembled using an automated assembly machine. The lugged jamb has an advantage in that it captures the
head jamb more securely which makes the doorframe easier to assemble manually.
The head jamb fits into the dado on the side jamb. The dado, therefore, is as wide as the head jamb is thick.
When the door stop is applied to the jambs before the units are assembled, it must be positioned correctly to
allow the head jamb to fit all the way into the dado and for the stop on the side jamb to butt up against the stop
on the head jamb. The stop on the head jamb is recessed the same amount as the depth of the dado on the side
jamb. The stop on the side jamb is recessed the same amount as the thickness of the stop material. (see page 30)
If mitered stop material is used, the stop on the side jambs is positioned flush with the dado. The stop on the
head jamb is recessed the depth of the dado. (see below)
On exterior jambs, where the stop and jamb are the same piece of wood, the recesses are produced by saw cuts.
Special saws equipped with dado heads are available to do this kind of cutting quickly and efficiently.
Jamb Assemblies
Flat jamb shown with mitered stop
Header
Jamb Dado
Side Jamb
Mitered stop
29
Jamb Assemblies
Flat Jamb shown with mitered stop
Header
Location of staple
to attach header to
side jamb
Side Jamb
Jamb Assemblies
Flat Jamb with square cut stop
Header
Side Jamb
Dado
Head stop
Side stop
30
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Jamb Assemblies
Flat Jamb with lugged dado shown
Dado with lug that forms a
notch to locate header
Header
Side jamb
This method is not commonly used due to the fact that the lug has to be cut-off to install the door unit in the
opening. The advantage of this method is that it holds the location of the header secure during shipping.
31
DOOR TYPES AND SIZES
The drawings on the following three pages, show the three most common types of door construction. “Hollow
Core” doors are used exclusively for interior applications. “Solid Core” and “Stile and Rail” doors are used primarily for exterior entrance doors but may be found in some interior applications. Hollow Core and Solid Core doors
are sometimes referred to as “flush” doors. Stile and Rail doors are a more traditional type door and are used as
entrance doors where added aesthetics are desired.
Hollow Core and Solid Core are somewhat similar in their construction. Both have a wood frame, a core and
are covered with some kind of wood or wood product skin. Wood veneer or hardboard are the two common
materials for door skins.
Stile and Rail doors are made up of a number of individual pieces of solid wood that are carefully fit and glued
together. The material used can vary from door to door and manufacturer to manufacturer but Douglas Fir, Philippine Mahogany, Red Oak and White Oak are the most common. The value of a Stile and Rail door is in its aesthetic appeal.
Doors are available in widths from 1’0” to 4’0” in 2” increments. The standard length for a door is 6’8”. Doors 7,
8, 9, and even 10 feet tall are available and are becoming increasingly more common.
Typical interior hollow core door components
Door Skins, wood veneer or
hardboard
Stiles
Rails
Lock Block
Honeycomb Cardboard
core material
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Door skins, veneer or
hardboard
Typical solid core door components
Stiles
Rails
Door core, particle board
or laminated material
Typical stile and rail door
Stiles
Rails
Panels
33
CASING
When a pre-hung door is installed, it is normally trimmed, or cased, around the edges of the jambs on both the
inside and outside of the opening. For interior doors, the trim on both sides of the door is referred to as casing.
On exterior doors, the trim on the inside is casing and trim on the outside is molding. Brickmold, as shown below,
is a common exterior molding.
Casing and molding are usually mitered (cut at 45º) where it joins at the top corners. Sometimes, the outside
molding is butt jointed (the top piece is set on top of the two side legs). This is usually done to create a rustic appearance or for other design considerations.
Typical casing profile
34
Typical brickmold
profile
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Casing
Head casing
Side casing
Side casing
Typical location of casing on jambs edge
35
Kerfed Casing
To hold the miters of casing or brickmold tightly aligned a process called “Kerfing” is done to the material after
mitering, A thin slot as seen in the illustration is cut into the miter, then a special nail called a “Spline Nail” is driven
into the slot of both the head and side casing.
Head casing
Kerf cut into
the miter
Side casing
36
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V-Nailed Casing
A common method for attaching the casing pieces to each other before assembly on the door is with a V-Nail
machine. This machine will hold, then staple the miter of the head and side casings together.
In this illustration we are viewing the casing from the backside.
Head casing
V-nails, Stapled to hold
the casing together
Side casing
37
Picture Frame Casing
When the three pieces of casing for one side of a door unit are pre-assembled, using either kerfing nails or V-nails,
the assembled unit is called “Picture Frame Casing”
The casing, after assembly, would be taken to the door assembly process and attached to the unit. Shipping the
casing pre-assembled is done due to it being very fragile and prone to breakage until it is stapled to the door unit.
38
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Section three • shop organization
Shop Organization
Section three
39
SHOP LAYOUT THEORY
To operate a pre-hung door shop efficiently, three conditions must be met:
• Availability of material to production lines
• The right equipment for the desired production
• The proper flow of the manufacturing process in relation to raw material and finished product
This section will discuss these factors and will address the process of actually “laying out” a pre-hung door shop.
The availability of material to the production line (or lines) should be the first priority when designing an assembly
line for producing pre-hung doors. Without the correct material at the proper place and at the proper time, efficient production is impossible. When material is received, it should be stored in an organized fashion. Blank doors
should be stored according to type and size. Jamb stock should be organized with interior jambs separated from
exterior jambs. Casing and stop material should likewise be separated and stored in an orderly manner.
The area required for receiving and for storing raw material would depend on production requirements and the
amount of inventory required. The storage area should be large enough to allow the materials to be easily located
and easily handled. The method used to move the raw materials from storage to the manufacturing area should
be considered and the appropriate sized aisles provided.
Any time spent having to find material or handling it unnecessarily will add to the cost of producing each door unit.
Having the proper equipment for the desired production is equally as important as having the proper raw materials available. Without the proper tools, only limited production is possible.
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SHOP LAYOUT THEORY
The pre-hung door assembly line consists of two major elements:
1.The Primary Line
2.The Secondary Lines.
The primary line is the path the door follows. It contains the door machine, the assembly table(s) and the casing
application area. The secondary lines are the path of the sub-components; i.e., jambs, stop casing, screws, hinges
and any other parts used on completed units except for the door itself.
The primary line is the easiest to arrange. It is usually a straight line with a definite and obvious sequence of operations with each process or station manned continuously. The primary line should have a steady flow and pace
that is established by the door machine operator. Any reason that causes the line to stop, or an operator to leave
his position should be avoided.
To be efficient, the primary line must be supported constantly by the secondary lines. If the size of the operation
requires that primary line personnel also supply sub-components, the sub-components should be stocked before
production is started, with a coordinated restocking of all stations simultaneously. They should be stocked in as
large a quantity as possible to reduce the frequency of starting and stopping the line.
The secondary lines contribute greatly to the labor content of the finished door units. It is often the most neglected and least efficient area in many shops. The machinery in the secondary lines (i.e., Strike Router, Trim Saws and
Jamb Stitcher) should not be viewed as individual work stations, but as operation points along an assembly line.
The machinery should be positioned with this in mind. The best approach is to first establish the most efficient
flow of material, then position the machines along this flow rather than to design a material flow around arbitrarily
placed machines.
From the time material is received until it is shipped as finished door units, it should always be moving in lines that
are as straight as possible with as few stops as possible. The manufacturing area should have adequate space for
working around equipment and the free movement of material. It should not be so spread out that time and energy are lost in the movement of personnel and material. The receiving area should be large enough to store the
required raw materials. The shipping area should be set up with enough room to keep any surplus finished units
that are not going to be immediately shipped.
The best method to optimize the total pre-hung door manufacturing system is to make a scale drawing of the
entire operation including receiving, storage, processing and shipping. On the drawing make a line showing the primary line (the line the door follows from receiving to shipping) and then position the door machine and assembly
tables. Again, this line should be as direct and straight as possible. Next, make similar lines for each component in
the secondary line (again, from receiving to shipping) and position the associated machinery. You should now have
a complete map of material travel. Personnel can now be added showing work areas. Once the layout is complete and all movement and processes considered, evaluation can be made by measuring efficiency levels (pg. 49).
Determining the proper system for an existing shop or building may require compromises due to size and shape
of available space. Weigh the compromises carefully. But remember, the primary objective is to maintain the “assembly line” process.
41
COMPONENT FLOW
The Primary Product Material Flow (pg. 43) layout shows various materials and how they would flow
through a typical door shop. As you can see, the primary line is a direct path but the sub-components and their
various processes form a more complex routine. In optimizing this type of manufacturing area, all these processes
need to be organized to easily flow toward the point of actual use on the primary line. This example shows an
operation using flat jambs. If split jambs were used, the flow of sub-components would be different.
The use of material carts is highly recommended for efficient material handling. Without carts for the operators
to pull material from it would be necessary to re-stock permanent racks at each process location. Re-stocking is
double handling of material and can disrupt production.
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Primary Product Material Flow
Jamb Inventory
Door Inventory
Jamb
Stock
Jamb
Stock
Casing & Stop
Inventory
Stop
Application
Casing Saw
Jambs
Jambs
Stop
Door Machine
Primary Line
Jambs
Jambs
Secondary Line
Strike
Router
Accumulated
Machined
Doors
Jambs
Jambs
Assembly
Table
Secondary Line
Casing
Completed
Units
43
MATERIAL HANDLING PROCEDURES
Manufacturing pre-hung doors is an assembly line process. Whether you are producing 50 or 500 doors per day,
the same considerations should be made for material handling. From receiving to shipping, the entire process
should be viewed as a system with all processes and materials in the system working together for optimum productivity and efficiency.
The assembly line required to manufacture pre-hung doors is a material handling process, and material handling
adds labor costs. In fact, the labor involved in handling the door and its components, usually exceeds the labor
involved in the actual machining and assembling the door unit itself. For this reason, it is most important that all aspects of material handling be analyzed before setting up a shop for production. Time invested in establishing good
material handling procedures will be well invested.
Below is a list of basic handling rules that should be followed in any assembly line-based manufacturing operation:
1.
2.
3.
4.
5.
6.
7.
8.
Handle the material as few times as possible.
When material is received, put it immediately into its storage location.
Store material in the same configuration as it is received.
Handle material only to perform an operation on it or to position it in preparation for an operation.
Any time a piece of material is handled, do as many operations on it as possible.
Move material in the largest quantities possible. “One at a time” is very expensive.
All materials should always be flowing toward shipping throughout the entire process.
Machine operators should be working on material, not trying to find it!
The first and most important step in producing pre-hung door units is getting material through the assembly line
process. Coordinate the material at receiving to insure that the correct material is sent to the manufacturing area
before it is needed. This step would also insure that the material pulled is of a usable quality. The time involved in
getting needed material or rejecting faulty material by the manufacturing area can determine whether or not that
particular action is a profitable one.
The most efficient method to move materials from receiving to the places where they are needed is to use carts,
mobile racks and fork lifts. These carts and racks would also take the place of permanent racks at each processing
area. Restocking permanent racks is double material handling. It not only increases labor costs, but reduces flexibility when changing to a different type of material.
The goal for efficient operation is to have all materials in place along the assembly line before they are actually
needed to avoid disrupting production. Again, carts and mobile racks are ideal as they can be quickly rolled into
place to replace empty ones. To maintain continued production of the assembly line, a system should be established to insure proper flow of materials. Carts and racks must be loaded in advance and ready to go. Having the
correct material at each station prior to its need is the goal.
To maintain smooth uninterrupted production, an orderly method of transferring finished units from the manufacturing stage to the shipping stage is required. Thus, someone would be designated the responsibility of accepting
finished units from manufacturing for delivery. This person would be responsible for checking finished units against
orders for accuracy and for quality.
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The following illustration (pg. 46) shows various material paths in a typical shop. The method of material movement should be considered in each step.
Steps 1, 2, and 3 are moving raw material from inventory to the first operation. Steps 1 and 2 are good candidates
for using wheeled carts while step 3, the movement of door blanks could either be by forklift or by cart.
Steps 4 and 5, is the transfer of prepped jambs and casing to the assembly line. In each case this is best done with
carts that can be quickly moved into place on the production line without disrupting the workflow. This situation
also requires that the empty cart or rack be easily removed when empty. This is an area where many use a cart to
“re-stock” a work area, this is to be avoided as it has two distinct problems, and they are;
• Stocking work area racks is double handling of material
• The action of restocking usually stops the production line.
Step 6, moving finished goods to shipping should be in such a way that the last time the door unit is handled as a
single unit is when the assembly operator places in onto the cart, pallet, or rack. The units are shipped on the carts
or racks that receive them from the last process of assembly.
45
Moving Material Efficiently
Raw Material Inventory
3
Jamb
Stock
Stop
Application
Casing Saw
Jambs
Casing
Jambs
Stop
Casing
Jamb
Stock
2
1
Door Machine
Primary Line
Jambs
Jambs
Secondary Line
Secondary Line
5
4
5
Strike
Router
Accumulated
Machined
Doors
Assembly
Table
Jambs
Jambs
Casing
Door Unit
Cart
6
Completed
Units
46
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Operation Descriptions
The operations in the example are numbered 1 through 4. Following is a description of each function. In actual
operation, functions 1 and 2 would be permanently staffed. Functions 3 and 4 could be operated by one person
or part time for each operation.
Operation #1
Door machine operator receives the blank door from the door cart, the hinge jamb from the jamb cart, and processes both through the door machine. Butts are applied, and the door and jamb are placed on the door accumulator.
This is a full time position with the operator never leaving his work area.
Operation #2
The assembly table operator receives the door and jamb from the accumulator. Strike and head jambs from their
respective carts, and complete the frame around the door. Casing is then applied and the finished unit is placed
on the completed unit cart.
This is a full time position with the operator never leaving his work area.
Operation #3
Stop-jamb stitching. Flat jamb stock from inventory and cut door stop is parked next to the stitching operation
and processed through the stitcher. It is then placed on the cart. Both Side jambs are taken to the Magnum door
machine. This arrangement allows the door machine operator to pull jamb stock for hinge jambs directly. The
jambs for strike plate routing can be pulled from the same stock. Head jambs would be transported directly to the
assembly table.
This is a part time position as this operator can produce more material than is required per shift. The duties of this
operator would shift to machining strike jambs, moving stock to the assembly line or performing any custom functions such as modifying material with the radial arm, chop saw, or table saw.
Operation #4
Miter saw operation. Casing or door stop from inventory is cut to finished length and placed on carts to transport to the next operation. Casing would go to the assembly table area and the door stop would go to jamb
stitching operation.
47
Jamb
Stock
Jamb
Stock
Operation Descriptions
Operation # 3
Stop
Operation # 4
Jambs
Jambs
Operation # 1
Jambs
Jambs
Operation # 2
Accumulated
Machined
Doors
Jambs
Assembly
Table
Jambs
Casing
Completed
Units
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MEASURING EFFICIENCY LEVELS
Most door shops have unique requirements. The production needs per shift, materials, equipment, and layout all
are variables. Setting up a shop to produce pre-hung door units with the lowest labor cost per door unit is a
challenge, but is even more of a challenge without the ability to measure or benchmark the performance of the
operation.
The machines that Norfield manufactures are used for many different applications. These differences in use make it
hard to compare the output of doors per day, or doors per hour, between different operations. We have seen, as
an example, customers with Magnums that barely produce 75 doors per shift, while others may get 225 doors per
shift. This is not necessarily a difference between efficiency levels. The shop producing 75 doors per day may be
making commercial doors with no two doors alike. The Shop that produces 225 doors per day may be producing
interior doors with very little variation, possibly with door blanks purchased pre-sized and pre-beveled, using drive
in bolts without a faceplate mortise.
The way to benchmark your shops efficiency level is to complete a series of measurements to establish a baseline.
Step 1. Using a stopwatch, time the production of 4 or 5 doors to establish a typical time per door standard. If
while doing this timing the line stops for any reason, such as a lack of material, order sheet, hardware, or whatever
reason, stop and start over again. Divide the total time by the number of doors for your “Time Per Door” value
Step 2. Calculate the number of man minutes per shift, deduct all breaks, meetings, functions other than door unit
production. Establish a value for “Man Minutes Per Shift”
Step 3. Determine what you think would be an achievable goal for labor efficiency, this is a tricky calculation. In this
type of work, 75 to 80 percent efficiency would be good.
Step 4. Determine your current “Door Units Per Shift”, this should be an average of production over at least 5
days production.
An Example
Time Per Door
92 seconds
Man Minutes Per Shift
400 Minutes, (24,000 Seconds per shift) (400 X 60)
Employee Efficiency Goal
80%
Current Door Units Per Shift
122
Available Man seconds @ 80% Eff.
= 19,200 seconds
(80% of 24,000)
Available time divided by Time per door =208.7
(19,200/92)
Current Door Units Per Shift=
122
Difference
86.7
49
These numbers are relatively typical. The question that usually arises is what causes the difference between actual
units per shift and calculated units per shift. Which is an interesting question, as we have calculated efficiency to be
80%, which should give us realistic results.
The answer is that you can produce 86 more doors per shift, or reduce your labor cost per unit by over half with
the same production.
Our experience shows us that typically the reason for the difference is at least one or more of the following;
•
An operator leaving his work area, stopping the line
•
A problem with the shop order that needs clarification, stopping the line
•
A lack of materials (doors, jambs, hardware), stopping the line.
Once you have determined that you have room for improvement, you can begin identifying the inefficiencies in
your production lines. One proven method is to write down what you feel are the most common causes, such as
material or paperwork shortages. Give someone on the line the task of marking down each time there is a stoppage on the line next to the reason. After a period of time, you can see where the culprits are and go to work
on eliminating the causes. Re-arranging the secondary material lines, or changing the work order forms are typical
tasks that can cause improvements.
Periodically you can measure to establish your “Time per Door” and “Current Doors per shift” to see if your
changes are making a difference.
Another method to identify inefficiencies is video taping. This is best done with the cooperation of the line operators. Making the line more efficient makes the operators’ job easier, so video tapping during production is a positive action.
If the camera is placed on a tri-pod and then ignored, the operator normally loses the self-conscious aspect created by management filming an employee working. The results of this video are usually surprising as problems that
arise become obvious when the tape is played back at a higher than normal speed.
Stoppage on the line is usually caused by one or more of the line operators leaving the work area then returning later. When asked where they went they usually had a legitimate reason, such as finding the right jamb, getting
another door, etc. Stopping these errands will result in higher production and an easier, less hassles job for the
operators.
A good example is when the inevitable happens and a door on the line is damaged, or the material is bad, don’t
stop the entire line until resolution is found, continue on with production, and have a part time or floater worker
step in to fix the problem, keep the assembly line moving.
However you measure, once you apply your fixes you need to measure again to make sure that you have not only
fixed the targeted inefficiencies, but that you have not created new ones. Measure, apply fixes and measure again.
50
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PNEUMATIC LAYOUT
The layout of the pneumatic system for the pre-hung door manufacturing facility is of primary importance. Without the proper air supply, the door hanging equipment (most of which is air-operated) will not function adequately.
There are five factors to consider when establishing the pneumatic layout for a door shop:
1.
2.
3.
4.
5.
Sizing the compressor and air dryer.
Sizing the feed lines and drops.
Location of the compressor system.
Filtration of contaminants.
Designing the system.
Sizing the Compressor and Air Dryer
To determine the correct size for the air compressor and air dryer, first total all the air-consuming operations
within the area to be serviced. The total may require correction for intermittently operated machines, but all machinery that could be operated simultaneously should be totaled. Once the total has been established, it is recommended that the size of the compressor be 30% to 50% larger than the calculated consumption to allow for line
loss, reduced duty cycle, and future additions.
All air compressors produce water which can be harmful to pneumatic tools and machines. Therefore, it is highly
recommended that a refrigerated air dryer be used. In-line filters only remove particle pollution thus allowing
moisture (water vapor) to pass into the system. The size of the dryer should be matched to the C.F.M. rating of
the air compressor, not the calculated air consumption of the air-operated tool and machines. This effectively oversizes the dryer for the same reasons as the compressor: line loss, duty cycle, and future additions.
51
Sizing the Feed Lines and Drops
The pipe size used in an air system is determined by the flow (C.F.M.) and the length of the run. The chart below
shows how length effects the pipe size.
Length of Run - Feet
SCFM
Compr.
Flow 25
50
75
100 150 200 300 500 1000 HP
4
½
½
½
½
½
½
½
¼
¼
1
12
½
½
½
¾
¾
¾
¾
1
1
3
20
¾
¾
¾
¾
1
1
1
1 ¼ 1 ¼ 530
¾
¾
1
1
1
1
1 ¼ 1 ¼ 1 ¼ 7 ½
40
¾
1
1
1
1 ¼ 1 ¼ 1 ¼ 1 ½ 1 ½ 10
60
1
1
1 ¼ 1 ¼ 1 ¼ 1 ¼ 1 ½ 1 ½ 2
15
80
1
1 ¼ 1 ¼ 1 ¼ 1 ½ 1 ½ 1 ½ 2
2
20
100 1 ¼ 1 ¼ 1 ¼ 1 ½ 1 ½ 2 2
2
2 ½ 25
120 1 ¼ 1 ½ 1 ½ 1 ½ 2
2
2
2 ½ 2 ½ 30
160 1 ¼ 1 ½ 1 ½ 2
2
2
2 ½ 2 ½ 3
40
200 1 ½ 2
2
2
2
2 ½ 2 ½ 3
3
50
240 1 ½ 2
2
2
2 ½ 2 ½ 2 ½ 3
3
60
300 2
2
2
2 ½ 2 ½ 3
3
3
3 ½ 75
400 2
2 ½ 2 ½ 2 ½ 3
3
3
3 ½ 4
100
500 2
2 ½ 2 ½ 3
3
3
3 ½ 3 ½ 4
125
Also, in determining the proper size to use, consider that the larger the size used, the less velocity the air will have.
This allows the air more opportunity to cool after being compressed which enables the moisture to condensate
out of the air before it reaches the machines or tools (thus the need for water traps).
Over-sizing the lines also creates an accumulator, or surge tank, which reduces the pressure drop along the system
when large amounts of air are intermittently used along the system.
Location of the Compressor
The air compressor and air dryer should be located as close to the air-consuming operations as possible to reduce
the line loss caused by long runs and to eliminate large pipe sizes.
The compressor will be affected by extreme heat or cold and dust in the air intake. A common practice is to pipe
the air intake through an exterior wall or place the compressor outside (shielded from direct weather). Good access to the compressor and dryer for periodic maintenance should also be considered.
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Pneumatic layout loop system
53
Pneumatic layout detail
Drops Tee Out of
Top of Header
Header
2 Degrees
Drop Leg
To Air
Dryer
To
Machine
Drain Valve
Drain Valve
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1-800-824-6242 • 1-530-879-3137
Filtration of Contaminants
All of Norfield’s machines are equipped with a Filter-Regulator-Lubricator (F.R.L.) to remove oil, dirt, grit, rust, pipe
scale, and all other contaminants from the air system. However, mainline filtration is also required to protect handheld pneumatic tools, such as staple guns and air screwdrivers, and to protect the entire air system from contamination.
A major problem with almost all air systems is a lack of proper maintenance to the filters, compressor and air
dryer. It is highly recommended that a periodic maintenance schedule be adopted and followed.
Designing the System
Layout of the air system is more than just getting the air from point A to point B and pipe size. The feeder loop
should have at least a 2 degree slope toward a drop leg to encourage accumulated moisture to gather at a drain
point. When a “tee” is placed in the loop, it should tap the top of the feeder loop so as not to allow accumulated
moisture and contaminants to enter the drop leg. The drop should also have a “tee” for its tap point and continue
downward to its drainage point.
55
ELECTRICAL LAYOUT
To determine the electrical layout for a pre-hung door shop, draw a scale floor plan showing all machinery requiring electricity. Label the electrical requirements of each machine. Next, position circuit breaker panels near each
machine accessible to the machine operator. These are recommended for the disconnection of power to each
machine when performing maintenance or at the end of each workday.
If you are establishing a new shop and/or adding machinery to an existing one, it is advised that the voltage available in the building where the machinery will be located be checked. In some cases, 208V, 3-Phase may be available in a building adjacent to the one that has 230V, 3-Phase. Checking the voltage will avoid possible confusion
later.
Most of Norfield’s machines are set-up to operate with a choice of 3-Phase voltage input to match the voltage availability locally (i.e., 208V, 230V or 460V). When ordering machinery, make sure that the voltage ordered
matches that of your area and building. In some cases transformers are supplied and in others the machines are
wired directly, be sure to discuss your needs with Norfield’s sales staff.
If you move machinery to a new location and the available voltage is different than at the previous location, the
machines can usually be converted to the correct voltage by either changing certain electrical components in the
machine or by adding transformers to the input voltage. In either case, the work should be done by a qualified
electrician who is familiar with 3-Phase installations, or by a Norfield Service Technician.
When connecting power to Norfield machinery (or any machinery, for that matter), refer to the installation instructions or the service manual. Again, electrical connections should only be made by a qualified electrician.
56
1-800-824-6242 • 1-530-879-3137
Section four • sample shop layouts
Sample shop layouts
Section four
57
Up to 75 Doors per shift
Machinery
1. Magnum
2. 250M
3. Miter Saw
4. Radial Arm Saw
5. Table Saw Door machine for special, custom, and exterior units
Strike jamb router
Cuts jamb, casing, and stop
Cuts jamb and stop material to length
For ripping doors or jambs to custom size
Machine Capacity Rate
Magnum =
30 doors per hour
Manpower Requirements
3 people
Operator 1
Door Machine Operator performs all machining to door and hinge jamb, including hinge butt application.
Operator 2
Door Unit Assembler assembles the frame around the door and applies casing to complete the door unit. This
operator is also responsible for machining the strike jambs on the 250M.
Operator 3
Miter Chop Saw Operator cuts jamb, casing, and stop material to the appropriate length and performs any custom
modifications. Not a full time job unless added to door pulling and all supply to the primary line.
Approximate Floor Space Requirement
Approximate Electrical Requirement
Approximate Air Supply
58
3,500 Square Feet
30 Amps @ 230 Volt 3-Phase (Plus Vacuum Input )
15 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
59
75-200 Doors per shift
Machinery
1. Magnum
2. Magnum Loader
3. Magnum Un-loader
4. 250M
5. 450
6. 1020
7. Radial Arm Saw
8. Chop Saw 9. Door Cut-Off Saw
Door machine
Loads a stack of doors
Tilts door Horizontal for Assembly
Strike jamb router
Stop jamb stitcher
Double end trim saw
Cuts and miters custom materials
Cuts doors for custom applications
Magnum =
30 doors per hour
4 people
Operator 1
Door Machine Operator performs all machining to door and hinge jamb, including hinge butt application.
Operators 2
Door Unit Assembler assembles the frame around the door and applies casing to complete the door unit.
Operator 3
450 operator, applies stop to flat jambs and stocks the primary line as well as machining the strike jambs on the
250M.
Operator 4 and 5
1020 operator and any custom jamb or door prep.
Since the stations shown are not full time jobs, operators 4 and 5 are the same person, filling into to supply subcomponents to the line as needed. Usually these positions include pulling blank doors and all sub-components
60
4,000 Square Feet
30 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
61
200-300 Doors per shift w/Custom and Exterior Doors
Machinery
1. Magnum
2. Magnum Loader
3. Magnum Un-loader
4. 250M
5. Magnum
6. Magnum Loader
7. Magnum Un-loader
8. 250M
9. 450
10. 1020
11. Door Cut-Off Saw
12. Radial Arm Saw
13. Miter Chop Saw
Door machine for interior doors
Strike jamb router
Door machine for special, custom, and exterior units
Strike jamb router
Stop jamb stitcher
Double end trim saw for mitering casing
Cuts doors for custom applications
Cuts jamb, casing and stop
Magnum
=
30 doors per hour
6 people
Operators 1and 3
Door Machine Operator performs all machining to door and hinge jamb
Operator 3 and 4
Door Unit Assemblers assemble the frame and apply casing to the door unit.
Operator 5
450 Operator prepares flat jambs by applying stop.
Operators 6 and 7
1020 operator, since the stations shown are not full time jobs, operators 6 and 7 are the same person, filling into
to supply sub-components to the line as needed. Usually these positions include pulling blank doors and all subcomponents
62
5,525 Square Feet
40 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
63
300-400 Doors per shift
Machinery
1. 4000 System
2. 250M
3. Magnum Door Loader
4. Magnum
5. Magnum Un-Loader
6. 450
7. 1020
Automated door machine system
Strike jamb router
Loader for stack loading of Magnum
Door machine for special, custom and exterior units
Door rotation for feeding assembly table
Stop jamb stitcher
Double end trim saw
4000 System =
45 doors per hour
Magnum
=
30 doors per hour
7 people total for both lines, plus stock-puller/warehouse worker (not shown).
Operator 1
4000 System Machining Stage Operator.
Operator 2
4000 System Assembly Stage Operator.
Operator 3
4000 System Casing Applicators
Operator 4
Magnum Operator - custom specials and exteriors.
Operator 5
Door Unit Assemblers - for custom, special, and exterior units; frame assembly and casing application.
Operator 6
450 Operator, for casing and jamb preparation.
Operator 7
1020 Operator, for casing and jamb preparation. Also stocks primary line
64
6,000 Square Feet
60 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
65
300-400 Doors per shift, large variety
Machinery
1. Eagle System
2. 250M
3. Magnum Door Loader
4. Magnum
5. Magnum Un-Loader
6. 450
7. 1020
Automated door machine system
Strike jamb router
Loader for stack loading of Magnum
Door machine for special, custom and exterior units
Door rotation for feeding assembly table
Stop jamb stitcher
Double end trim saw
Eagle System =45 doors per hour (6’8” to 8’0”)
Magnum
=30 doors per hour
7 people total for both lines, plus stock-puller/warehouse worker (not shown).
Operator 1
Eagle System Machining Stage Operator.
Operator 2
Eagle System Assembly Stage Operator.
Operator 3
Eagle System Casing Applicators
Operator 4
Operator 5
Door Unit Assembler - for custom, special, and exterior units; frame assembly and casing application.
Operator 6
Operator 7
Approximate Electrical Requirement Approximate Air Supply
66
6,000 Square Feet
60 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
67
400-600 doors per shift
Machinery
1. SSDL
2. 5000 System
3. 5100
4. Magnum Loader
5. Magnum
6. Magnum Un-Loader
7. 450
8. 250M
9. ASR2200
10. 1020
Single Stack Door Loader
Volume interior door line
Assembly Table
Door loader for Magnum
Door Machine
Door Un-Loader for Magnum
Stop jamb stitcher
Strike jamb router
Automatic strike plate router
Double end trim saw
5000 System =
60 doors per hour
Magnum
=
30 doors per hour
10 people, 7 operators and 3 stock pullers not shown
Operator 1
Operator 2
Assembly Stage Operator.
Operator 3
Casing Applicators.
Operator 4
Operator 5
Door Unit Assemblers - for custom, special, and exterior units; frame assembly and casing application.
Operator 6
Operator 7
68
7,700 Square Feet
70 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
69
500-900 doors per shift
Machinery
1. High Speed 5000 System
2. ASR2200
3. 450
4. 250M
High volume interior door line
Automatic strike plate router
Stop jamb stitcher
Strike jamb router
High Speed 5000 System
120 doors per hour
=
5 operators, 2 stock pullers if casing is not applied
7 operators, 2 stock pullers if casing is applied
• The method and requirements of packaging and labeling could effect the operator count
Operator 1
Operator 2
Assembly Stage Operator.
Operator 3
Door unit packaging and labeling.
(if casing is applied, add two additional operators)
Operator 4
Operator 7
70
7,700 Square Feet
70 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
71
Steel and Fiberglass door lite cut-out and assembly
Machinery
1. 3800
2 - 6. Time Fold Series
7. Radial Arm Saw
8. Miter Chop Saw
Metal door window lite cut-out and lock preparation
Metal door assembly system
Cuts jambs, casing, and stop
3800 Door Lite Machine
Time Fold Series
=
=
150 doors per day
30-200 doors per day (depending on setup)
4 people
Operators 1, 2, and 3
Metal Door Unit Assemblers assemble metal exterior door units.
Operator 4
3800 Operator machines metal door lite cut-outs and lock prep.
Operators 5 and 6 (Part Time)
Part time special operations and modification workstations. Operators 1 thru 4 could perform these tasks as work
load changes
72
4,950 Square Feet
5 C.F.M. @ 90 P.S.I.
1-800-824-6242 • 1-530-879-3137
73
Manual Prehanging Shop
Tools 1. Workstation or work table
2. Hingemaster Hinge Routing Fixtures
3. Door stand
4. 1-1/2 HP Router
5. 1/2 “ Cordless Screwdriver
6. Planer
7. Slick plane
8. Lock Boring Kit
9. Strikemaster Strike Jamb Routing Kit
10. Table Saw
11. Miter Chop Saw
12. Radial Arm Saw
13. Staple Guns
14. Material Racks and Carts
15. Work Benches
Norfield P/N’s
MFG 56015
MFG 200
DEW 616
DEW980
BOS1594
WOO1100
TEM 101
TNS 200
DEN705
Capacity Rate
5 doors per hour
2 people
Operator 1
Performs all machining operations to the doors and hinge jambs. Also takes the blank doors and hinge jambs from
carts and performs all the machining operations including hinge butt application; places the door with the hinge
jamb attached near the assembly tables.
Operator 2
Machines the strike jamb, assembles frame and applies casing to complete the door unit. The door and hinge jamb
are placed on the assembly table where the head jamb and strike jamb are stapled in. Casing is applied and the
completed unit is stacked in a completed unit cart.
Approximate Electrical Requirement Approximate Air Supply 74
1,500 Square Feet
30 Amps @ 115 Volt 1-Phase (Does Not include any Vacuum)
10 C.F.M. @ 9
1-800-824-6242 • 1-530-879-3137
75
PREHANGING SYSTEMS
More companies rely on Norfield machinery than any other be-
Quality service for your machinery is also supported by placing Norfield-
cause excellence like this is always considered a sound invest-
certified Field Engineers locally, throughout the country. In addition we carry
ment.
over 3000 parts and supplies to support the operation of small and large
ness
Star t to finish, Norfield employs the most advanced busiand
manufacturing
techniques
to
ensure
our
machines
exceed your expectations.
get it to you quickly.
EAGLE SYSTEM
FLEXIBLE AND FAST PREHANGING MACHINE
DOOR SPECS
FEATURES
8'0"
6'6"
Door Width
1’6” to 3’6”
Door Height
6’ 6” to 8’0”
3'6"
1'6"
5000 SYSTEM
Door Thickness
1-3/8 to 1-3/4”
6'6"
Door Width
1’6” - 3’6”
Door Height
6’ 6” to 7’0”
Door Thickness
1-3/8 to 1-3/4”
3'6"
1'6"
MAGNUM SYSTEM
• Automatic door width adjustment
• Automatic door feeding, and positioning for right or left hand doors
• Automatic pre-drill for 3-1/2” hinges
• Automatic hinge application - operator places hinges on applicators
• Automatic 2-1/8” lock bore, latch bore and faceplate routing
• Center-mounted start controls ergonomically placed for operator
• E-stop with air dump releases pinch points and clamps for safety
• Door pull boring for closet doors
• Simplified sensors ensure reliability at higher operating speeds
• Machine clamps the door up for varying door thickness
• Simplified re-positioning of door for handling changes
• 7” operator touchscreen with graphical interface for ease of use
Upgrade options available
DOOR SPECS
FEATURES
9'0"
6'8"
Door Width
1’0” to 4’0”
Door Height
up to 9’0”
4'0"
Door Thickness
up to 2-1/4”
• Raised molding compatible
• Two 8’ (for doors up to 8’) and one 9’ integrated stop systems for quick
change between pre-set hinge patterns
• Scaled index bar for door matching and special hinge patterns
• Pneumatic jamb adjustment to allow for perfect fit
• 3º faceplate mortising for beveled doors
• Self-centering router for easy hinge mortising
• 3º beveler/sizer and 3º hinge mortising
• Variable-speed powerfeed for soft & hard woods
• Combination door jamb stop
• Partial lock boring for door pulls
• Insert cutters for low-cost replacement
• Dust collection plumbing for safety
DOOR SPECS
FEATURES
7'0"
6'6"
Door Width
1’6” to 3’6”
Door Height
6’ 6” to 7’0”
3'6"
SYSTEM COMPONENTS
SIGNATURE SERIES MAGNUM
MAGNUM LOADER
MAGNUM UNLOADER
OPTIMUM SPEED/SHIFT: Up to 200 doors
COST EFFECTIVE, RELIABLE HORIZONTAL PREHANGING MACHINE
1'6"
SYSTEM COMPONENTS
5000 MC
530 LOADER
630 LOADER
540 ASSEMBLY CENTER
THE ORIGINAL VERTICAL DOOR MACHINE
1'0"
SYSTEM COMPONENTS
EAGLE MC
560 SIZER/BEVELER
530 LOADER
630 LOADER
540 ASSEMBLY CENTER
FEATURES
7'0"
76
• 7” touchscreen controlswith on-screen diagnostics & help screens
• Integrated system control
• One-touch change between A & B hinge patterns
• Raised molding ready
• Auto door position and door feed
• Auto width indexing
• Flush hinge-mortising on double beveled doors
• Interior/exterior ready for both wood and fiberglass
• Centrally located ergonomic controls
• Non-marking rubber rollers
• Dust collection plumbing for safety
THE FASTEST PREHANGING MACHINE IN THE WORLD
DOOR SPECS
4000 SYSTEM
prehangers alike. Count on Norfield to help you find what you need and to
• Bottom-up clamping system, which accommodates both interior
and exterior doors
• Underside lock drilling enables exit cut viewing for quality control
• Superior dust collections system
• Chip breaker to achieve crisp clean mortising
• Automatic lock, latch and faceplate machining
• Industrial grade material and parts for longevity
Door Thickness
1-3/8 to 1-3/4”
1-800-824-6242 • 1-530-879-3137
SYSTEM COMPONENTS
4000MC
4100 ASSEMBLY CENTER
4200 LOADER
AUXILIARY MACHINERY
3800 Door Lite Machine
THE INDUSTRY’S MOST RELIABLE DOOR LITE MACHINE
DOOR SPECS
FEATURES
• Door Height
• Thickness/Width
• Lock Bore Sizes • Lock Backset
• Faceplate Width
• Faceplate Length
6'6" to 8'0"
1-3/4" thick / 4’0” wide
1-1/2" to 2-1/8"
2-3/8" to 2-3/4"
Adjustable to 1-1/8"
Adjustable to 2-1/2"
• Eight location clamping system provides a firm grip on the door
• Adjustable RPM speed control accommodates both wood and metal cutting
• Industrial air filter, dryer and regulator for long life
• Three location clamping actuation
• Protective Neoprene pads that protect the material from marring
Time Fold Series
METAL DOOR ASSEMBLY WITH LITE INSERTION IN UNDER THREE MINUTES
DOOR SPECS
FEATURES
• Door Width
• Door Height
• Lock Bore Sizes
2’-6" to 3’0"
6’-8" to 7’0"
1-1/2" to 2-1/8"
ASSEMBLY TIME: Under 3 minutes
• Work content is easily balanced among all personnel on the line
• Materials are available at each location to facilitate consistent work flow
• Tools are stored on units and are easily accessible
250m strike/jamB router
FAST,VERSATILE AND 9-FOOT JAMB-READY
DOOR SPECS
FEATURES
Material
Max
• Width
no limit
• Length
up to 9' 0"
• Thickness
to 1-5/8"
Process any strike up to 4-7/8" long, including T-strike
• Processes more than 75 types of strike plates with quick change template system
• Adjustable deadbolt stop system to accurately place the deadbolt bore
• Processes any strike up to 4-7/8” long, including T-strike
• Includes 2-1/4” – 1/4R full lip template and 2-3/4” – 1/4R deadbolt template
2200 AUTOMATIC STRIKE/JAMB ROUTER
WILL MEET THE NEEDS OF THE HIGHEST VOLUME DOOR SHOP
DOOR SPECS
FEATURES
• Strike plate type
• Strike plate sizes
• Jamb length
• Jamb width
• Jamb thickness Full lip only
2-1/4" to 3-1/8"
70" to 96"
2-1/2" to 10-1/2"
1/2" to 1-1/2"
AVE. CAPACITY: 15 cycles/minute
• Infinitely adjustable jamb stops
• Accommodates a variety of jamb widths and lengths
• Foot pedal operation for ease of use
• Dust collection ready for operator safety
• Adjustable strike plate sizes from 2-1/4” to 3-1/8”
1020 DOUBLE END TRIM SAW
A COST-EFFECTIVE,VERSATILE TRIM SAW THAT IMPROVES SAFETY AND EFFICIENCY
DOOR SPECS
FEATURES
Casing Jamb and Brick Mold
• Length
1' 6" to 8' 0"
• Width
to 3 1/2"
• Thickness 3/8" to 1-1/2"
Compound angle
0º to 10º
Angle of cut
90º to 45º
• Hopper feeding for ease of use
• Compound angle adjustments for variety of cuts
• Industrial-quality 60-tooth carbide-tipped 10” saw blade
• Adjustment switch for changing from 45º to 90º with ease
450 FLOW-THROUGH STITCHER
VERSATILE AND 9-FOOT JAMB-READY
DOOR SPECS
• Jamb width
3-1/2" to 8"
• Jamb thickness 7/16" to 7/8"
• Stop width
1" to 2"
• Stop thickness 1/4" to 5/8"
• Reveal 1-7/16" to 1-13/16"
• Staple spacing
2” from top and 3” from bottom of stop
with 10-1/4” between staples or finish nails in standard mode.
FEATURES
• Foot pedal activation
• Mounts for standard capacity guns
• Non-marking rubber wheels
• Adjustable mode allows for custom staple spacing
8900 DEEP LOCK MORTISER
DEEP LOCK MORTISING AND FACEPLATE ROUTING IN ONE MACHINE
DOOR SPECS
FEATURES
• Door width
• Door height
• Door thickness
• Pocket length
• Pocket depth
• Pocket width
• Faceplate length
• Faceplate width
• Faceplate depth
no limit
6' 4" to 9'0"
1-3/8" to 2-1/4"
1" to 8"
n/a to 6"
3/4" to 1-1/4"
1/2" to 8-1/2"
1" to 1-1/4"
n/a to 3/8"
AVE. CYCLE TIME: 1-1/2 minutes
• Edge processing ideal inline with Magnum or as a stand-alone
• Self-centering clamp compensates for different door thicknesses
• Quick-change setups for different sizes and depths of mortise
• No templates needed for faceplate routing
• Faceplate routing can be done with square to face of door or on a
3º bevel; change-over time approximately 15 seconds
• Doors greater than 8’-0” can be processed using a layout line system
• Programmable logic controller improves safety and reliability
• Infinite adjustment capability
77
Machinery
TOOLS
SUPPLIES
SERVICE
Norfield has focused on the design
and manufacture of quality prehanging machinery since 1959. Our goal
has been to continue to serve this
ever-changing industry by providing machinery that offers greater
flexibility. We are also responding
to your need to meet condensed
production times by designing highspeed prehanging machinery. Our
manufacturing standards remain at
the superior level that is a hallmark
of Norfield machinery.
As your supplier, we understand
the demands the market places on
specialization. For instance, we have
tools that allow you to make ADA
compliance simple, tools that will
ensure greater accuracy for many
applications, and tools that will help
speed up your processes. And some
of them are only available from us.
We demand the same high quality
of production when we build these
specialized tools for you.
Norfield’s commitment to you includes having over 3,000 machinery
parts and prehanging supplies available to you at the fastest possible
speed. We run at a 98.9% stocking
rate, so rest assured: what you need
is usually on our shelves. If you place
your order by 2:30 p.m. PST, we
guarantee it for next-day delivery.
For those of you with extensive
needs, we also offer long-term
scheduled deliveries of
frequently used machine parts and
supplies.
In our desire to be your
prehanging supplier of choice, we are
dedicated to keeping your operation
running at its optimum. We fully certify our Field Engineers to maintain
and repair all Norfield machinery,
as well as many others. To ensure a
high and consistent level of service,
you will be assigned an engineer
from your area. This also reduces
response times, in many cases to only
hours. And our Field Engineers also
stock an abundance of parts, further
reducing your downtime.
You’re always welcome at Norfield!
The best companies make a practice of finding out what the customer wants and needs, and then does something about
it. Daily. Everyone at Norfield has your best interests at heart because, ultimately, we know it creates the kind of long-term
relationships we’re proud of. We welcome your suggestions, comments, observations, peeves, and, of course, the occasional
pat on the back.
It’s not our style to offer you something that may not work, just because we’re under pressure to sell something,
anything. So, understand one thing: we welcome you because we understand that without you, we wouldn’t be here.
We invite you to look to our company as your primary source for all your prehanging needs. Become a part of the Norfield family. Tell us what you need. . .let us show you around! You’re always welcome at Norfield!
Bruce Norlie, President, in front of the Magnum, used daily at Meeks Lumber door shop in Chico, CA.
78
© 2006, Norfield Industries
44 Comanche Court | P.O.
Box 459 | Chico, CA | 95927 | www.norfield.com
1-800-824-6242 • 1-530-879-3137
530.879.3137 | 800.824.6242 | 530.879.3141 fax
10/15/07

fundamentals of door prehanging production

Transcription

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